I also had the problem that describe some here at the beginning: the plug held by a first function test no longer alone together and some colors were not or misrepresented. The answer, on the way, the fast and friendly customer service has brought Email me is: the cover of the plug bar slide back a little, so that the four pins are exposed in the bracket, and then connect to the controller. Both connectors are connected so rock solid and all lines of the bar will also get back enough juice to hide the colors DIR. Then move the cover forward so that the pins are again protected. That way, also fixes the problem that the colors can not be selected as indicated on the remote control.
For this price, it is definitely a worthwhile investment when you're on indirect lighting.
PS: in horror films suitable way, red as the perfect mood lighting :-)